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#include <minix/timers.h>
/*
* Deactivate a timer and remove it from the timers queue. 'tmrs' is a pointer
* to the timers queue. 'tp' is a pointer to the timer to be removed, which
* generally should be on the queue (but this is not a requirement, and the
* kernel abuses this). If 'prev_time' is non-NULL, it is filled with the
* previous timer head time, which always exists since at least 'tp' is on it.
* The function returns TRUE if there is still at least one timer on the queue
* after this function is done, in which case 'next_time' (if non-NULL) is
* filled with the absolute expiry time of the new head timer.
*/
int
tmrs_clrtimer(minix_timer_t ** tmrs, minix_timer_t * tp, clock_t * prev_time,
clock_t * next_time)
{
minix_timer_t **atp;
int r;
if (*tmrs != NULL) {
if (prev_time != NULL)
*prev_time = (*tmrs)->tmr_exp_time;
r = TRUE;
} else
r = FALSE;
tp->tmr_func = NULL; /* clear the timer object */
for (atp = tmrs; *atp != NULL; atp = &(*atp)->tmr_next) {
if (*atp == tp) {
*atp = tp->tmr_next;
break;
}
}
if (next_time != NULL) {
if (*tmrs != NULL)
*next_time = (*tmrs)->tmr_exp_time;
else
*next_time = 0;
}
return r;
}
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